My car has had Mobil 1 full synthetic 10W30 in it its whole life. Which is fine, but Since I bought the car, I have been running Valvoline Syn-Power full synthetic 5W30 due to better additives.
Unless you want to spend an arm and a leg on Royal purple or AMS Oil, go with Valvoline, its great stuff.
I would not use conventional oil unless you want burnt up turbo bearings.